docstr: Returns a Bokeh glyph object.
docstr_tok: ["Returns","a","Bokeh","glyph","object","."]
code: def _init_glyph(self, plot, mapping, properties):
      """
      Returns a Bokeh glyph object.
      """
      tile_source = mapping["tile_source"]
      level = properties.pop("level", "glyph")
      renderer = plot.add_tile(tile_source, level=level)
      renderer.alpha = properties.get("alpha", 1)
      return renderer, tile_source
  
file_path: holoviews/holoviews/plotting/bokeh/tiles.py
imports: import numpy
  from bokeh.models import BBoxTileSource, QUADKEYTileSource, WMTSTileSource
  from ...core.options import SkipRendering
  from ...element.tiles import _ATTRIBUTIONS
  from .element import ElementPlot
label_desc: Use image node_id 4 for calling the TilePlot obj's underlying member method code with example usage: obj._init_glyph(plot, mapping, properties) and returns: renderer,  tile_source